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Toyota Sienna Service Manual: Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Toyota Sienna Service Manual / U151e automatic transaxle / Automatic transaxle system / Diagnostic trouble code chart / Transmission Range Sensor Circuit Malfunction (PRNDL Input)

DESCRIPTION

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

MONITOR DESCRIPTION

These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/ neutral position switch circuit.

The park/neutral position switch detects the shift lever position and sends a signal to the ECM.

For security, the park/neutral position switch detects the shift lever position so that engine can be started only when the shift lever is in the P or N position The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N or D).

The ECM determines that there is a problem with the switch or related parts if in receives more than 1 position signal simultaneously. The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

1. One of the following conditions are met: Condition (A), (B), (C) and (D)

One of the following conditions are met: Condition (A), (B), (C) and (D)

COMPONENT OPERATING RANGE

WIRING DIAGRAM

WIRING DIAGRAM

1 INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Disconnect the park/neutral position switch connector.

(b) Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard resistance

2 INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY

 INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY

(a) Connect the park/neutral position switch connector.

(b) Disconnect the transmission control switch connector of shift lock control unit assembly.

(c) Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard resistance

3 CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

(a) Connect the transmission control switch connector of shift lock control unit assembly.

(b) Turn the ignition switch to the ON position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

Standard voltage

Standard voltage

HINT: *: The voltage will drop slightly due to lighting up of the back up light.

REPLACE ECM

Diagnostic trouble code chart
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